The headset and stemhttp://www.flickr.com/photos/71817058@N08/8147803605/
And here, the cassette and rear mech.http://www.flickr.com/photos/71817058@N08/8147836586/
After some thought and research, I reckon all i'd want to change would be the stem, bars, seat post and saddle, and possibly the shifters (to the XTR M900)
I'm a bit confused as to what type of stem
I can fix to the bike - would I need any particular style or dimensions?
And if I were to ever change the forks, what particular type sort of forks could I change to (leaving the same headset I have) ?
Good plan, don't get obsessed with weight, it a dark path!
Mavic 231 rims weigh around 408g so pretty good.
The Mavic headsets are quite sought after on here. The stem looks to be a 1 1/8" quill but you need to measure it to make sure.
I happen to have the Raleigh UGLI forks that were probably on it originally.
If you want to tighten / loosen the headset there is a grub screw to undo under the rubber band first.
intrincycle at gmail dot com
In the real world it probably won't work, in the theoretical world it is not impossible.